How to find μ₂ for a distribution

Find μ₂ for a distribution when the distribution is mesokurtic and μ₄ = 108?

240

How to find Pearsonian's Coefficient of Kurtosis (γ₂) for a distribution?

Find Pearsonian's Coefficient of Kurtosis (γ₂) for a distribution when μ₂ = 16 and μ₄ = 1024.

100

How to find Pearsonian's Coefficient of Skewness (γ₁) for a distribution?

Find Pearsonian's Coefficient of Skewness (γ₁) for a distribution when the the first three moments about 2 are 1, 16 and -40 respectively.

90

How to find μ₃ for a distribution?

Find μ₃ for a distribution when Pearsonian's Coefficient of Skewness (γ₁) = 1 and Standard Deviation = 4.

110